Not just the friends from this timeline in the present, but friends from this timeline in the past, and then friends in all the other cycles from the many various pasts and many various presents and maybe even a few friends she made in the various “futures” from this point on. How lonely a state of existence.

Immortality sucks in the fact that you are cursed to watch all you love a cherish grow old and die off while continue to live.
Add in a time loop back to just after you acquired immortality thus forcing you to bare witness to that again over and over?
Welcome to Purgatory-Hell…